Theodore hofstattee



' T. HOFSTATTER, Jr.

AUGER No. 62,849, Patented Mar. 12, 1867.

Jhznor THEODORE IIOFSTATTER, JR., OF NEW YORK, N. Y.

Lettcrs Pafnt Nb. 62,849, dated Maral; l2; 1867.

IMPROVEMENT IN AUGERS.

T0 ALL WIIOM IT MAY CONGERN: y

Be b known thnt I, Tnnononn HOFSTATTER, Jr.,.of the city, county, and State of New York, have nVcnted new and u seful Imprvements in Angers; and I do hereby (Inclure that the following is a. full, clear, and exac* description thereof, which will enab1e others skilled in the art to make ax'1d use tho same, reference bing huC the a.cconpanying drawings, forming part of this spccification, in which' Figure 1 represents a. sidoview of my invention.

Figure 2 is a, side view of the same pnrtly in section.

Similar Ietters of referenceindicnto likc parts.

The object of this invention is to provide an auger attachmont, whereby the same.mny be udjusted 60 bore holes of nn required depth; and whereby, nlso, When desired, the haies niay be countersunk.

The invention consiste in cntting a ,srew-threud upon the odgcs of the twist, so thnt a. countershik and a. thninb-cW, with intervening square or angular washer, may be secu1edthereon at an desired plaine, so that thereby the nuger mny be set to make 8, hole of any desired Iength, and to counterink the same, thereby combining the two tools, augcr and countersink, into one, which is Superior to the same on account of its compaotness, and becanS of its being adjustable.

A is a common screw auger, tl 1e cdgos of the twist on which are provided With a screw-thrad, a, on -shown, .so thnt the count-ersink I2, washer c, and thumb-sc'row d, may be set andheld thereo nt nny desired plane. The thrcnd is ont on beft re the mtal is tempered, as itwouLd be too difiult to do so on thhnrd steel. The counfesink l7 i s a nut,the outegr edg of which is'provided with cutting edges, similar to those used on the commonly usedcoixhtersink: This tool is screwed upon the nuger to thorequired deptb, and then the -washer c, which fits loosely around the nger, is laid over it. The thumb-screw (2 is :hen screwed agninst the washer,and all the parts are thereby heId firmly in. the required place. The countersink and washer may be omitted; if it is desi'red 'only to gnuge tiio dpth of t-he hole.

What I claim ms ne-w,- and desire to soeurs by Letters Patent, is- The counterink b, waher c, and thuinb-soroW (1, When constructed and urrnngod upon the sctewthreud a of the nuger A, and operating as herein set fortin for the purpose specificd.

TH. HOFSTATTER, JR.

Withcsss:

WM. F. McNAMABA, Annx. F. ROBERTS. 

